Open AccessDesign of triangular lattice photonic crystals using genetic algorithms
Author(s) -
Gong Chen,
Xiongwei Hu
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.927
Subject(s) - photonic crystal , hexagonal lattice , band gap , lattice (music) , dielectric , algorithm , optics , materials science , fourier transform , photonics , crystal structure , optoelectronics , physics , computer science , condensed matter physics , crystallography , quantum mechanics , acoustics , antiferromagnetism , chemistry
Genetic Algorithms (GAs) were used to design triangular lattice photonic crystals with large absolute band-gap. Considering fabricating issues, the algorithms represented the unit cell with large pixels and took the largest absolute band-gap under the fifth band as the objective function. By integrating Fourier transform data storage mechanism, the algorithms ran efficiently and effectively and optimized a triangular lattice photonic crystal with scatters in the shape of ‘dielectric-air rod'. It had a large absolute band gap with relative width (ratio of gap width to midgap) 23.8%.